The cost of an average American wedding has just hit a new, all-time high, reaching an average $31,213 in 2014, according to new research.

In 2013, an American wedding cost $29,858, on average.

The Knot 2014 Real Weddings Study surveyed around 16,000 American couples and also found that 45 percent of weddings exceed a couple's budgets and 23 percent lack a budget from the start. That number is up from 17 percent in 2009.

Most brides spent an average of $1,357 - just on their wedding dress.

Who is paying for these more expensive weddings? On average, the bride's parents contribute 43 percent, the bride and groom contribute 43 percent, and the groom's parents contribute 12 percent of the total wedding budget (others account for the remaining 2 percent). Only 12 percent of couples pay for the wedding entirely themselves.

Though the price of an average American wedding is on the rise, guest lists are actually shrinking.

"The average wedding now has 136 guests, down from 149 in 2009," said the Knot's Rebecca Dolgin.

Couples are also spending more on their reception and less on their ceremony. Spending for cocktail hours rose to 76 percent from 69 percent in 2010. In 2014, 28 percent of couples held their ceremony in a religious institution, down from 41 percent in 2009.

The survey also found that the cheapest place to tie the knot was Utah, where couples spent only $15,000 on the big day in 2014. The most expensive place was Manhattan at $76,328.